66000605406 has 16 divisors (see below), whose sum is σ = 138948643200. Its totient is φ = 20842296408.

The previous prime is 66000605399. The next prime is 66000605423. The reversal of 66000605406 is 60450600066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289476226 + ... + 289476453.

It is an arithmetic number, because the mean of its divisors is an integer number (8684290200).

Almost surely, 2^66000605406 is an apocalyptic number.

66000605406 is an abundant number, since it is smaller than the sum of its proper divisors (72948037794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66000605406 is a wasteful number, since it uses less digits than its factorization.

66000605406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578952703.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 66000605406 in words is "sixty-six billion, six hundred five thousand, four hundred six".